Non-return stop-valve.



A. SCHADE.

NON-RETURN STOP VALVE.

APPLICATION nun MAR. 18. 1914.

Patented May 4, 1915.

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W/T/VESSES.

OZLJJHM ATTORNEY.

THE NORRIS PETERS CO-. PHOTO-LI THOn WASHINGTON. D. C

A. SCHADE.

NON-RETURN STOP VALVE. APPLICATION FILED MAR. 18, 1914.

WIT/[159858 THE NORRIS FETERS ca.

PHOTO Patent-ed May 4, 1915.

2 SHEETS-SHEET 2.

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BY 7 MW fi/ lM' r ATTORNEY.

-LITHO.. WASHING TON. n. c.

UNITED STATE PATENT UFFICE;

ALBERT SGHADE, 0F PHILADELPHIA, PENNSYLVANIA.

NON-RETURN STOP-VALVE.

Application filed March 18, 1914.

To all whom it may concern: p

Be it known that 1,.ALBERT SoHADE, a citizen of the United Statesresiding in the city of Philadelphia, county of Philadelphia, and Stateof Pennsylvania, have invented certain Improvements in Non-Return Stop-Valves, of whichthe following is a specification.

My invention is an improved mechanism comprising one or more valvesadapted to be automatically opened'to permit the passage of fluid in onedirection and automatically closed to prevent a return flow, incombination with an auxiliary valve adapted to cover and uncover thepassage or passages of the valve or valves first named.

In its preferred construction, it comprises a case containing a cage orbox having passages controlled by and controlling a plurality of checkor non-return valves provided with means for guiding, limiting andcushioning their movements of reciprocation, in combination with amanually operated stop valve adapted for closing the cage or box toprevent flow in either direction.

The leading object of my improvements is to provide a simple, accessibleand efficient non-return stop valve having parts that are readilyassembled and dissociated.

In the accompanying drawings, Figure 1 is a sectional view of a valveembodying my improvements; Fig. 2 is a sectional view taken on the line2-2 of Fig. 1; Fig. 3 is a perspective view of a detached check ornonreturn valve; Fig. 4 is a vertical sectional view representing apreferred form of the check valve mechanism; and Fig. 5 is a top planview of details of the construction shown in Fig. 4.

The mechanism, as illustrated in the drawings, comprises a valve case 1having the inlet 2 and the outlet 3 between which is the diaphragm 4:containing a threaded aperture 5.

As shown in Figs. 1, 2 and 3, a cylindrical box or cage 6 is providedwith a diaphragm 7 containing the apertures or passages 8 and a threadedbase or diaphragm 9 containing the ports or passages 10, the base beingscrewed into the aperture 5. Check valves 11 control the passages 10 andare controlled by the guide wings 12 movable in the passages 8 and guidewings 13 movable 1n the assages 10, the wings 12 being provided with theshoulders 14 adapted to engage the Specification of Letters Patent.

Patented May 4:, 1915.

Serial No. 825,500. I

diaphragm 7 and prevent the wings 13 from being wholly withdrawn fromthe passages 10.

As shown in Figs. 1 and 5, the diaphragm has screwed into its aperture 5a box or cage 6 provided with a diaphragm 7 containing the apertures orpassages 8 and the threaded base or diaphragm 9 containing the ports orpassages 10, the base being screwed into the aperture 5. The checkvalves 11 which control the passages 10 are provided with pistons 11 andthe guide wings 12 which work in the cylinders or chambers 8 of the part7, these chambers being connected with the passages 8 by ducts 8". WVhenthese valves 11 are seated, steam can pass through the passages 8 intothe chambers 8 and when the valves are lifted from their seats, thesteam is trapped in the chambers due to the closure of these passages bythe pistons, whereby the rise of the pistons is cushioned, undesirablesharp impact of the parts is avoided, and chattering is prevented. Thepistons are made comparatively loose in the chambers so that theconfined steam can escape past them to provide a dash potaction and thewings prevent lateral or oscillatory movement of the elevated valves.

As the valves are returned to their seats, by gravity and the pressureof steam that may be confined in the chambers, they are cushioned inseating by the action of steam flowing through the passages 10 on theundercut conical valves surfaces 11'." which fit the complementaryconical surfaces 9, of the valve seats.

A cap 16 is fixed to the cylindrical casebranch 15 which contains thestop valve 19 having the circular seat or channel 20 adapted to fit thecircular wedge 20 at the top of the box 6, this valve being carried by astem having a cylindrical head 21 engaged in revoluble relation to thevalve by the bush 22, a cylindrical section 23 revoluble in andlongitudinally movable through the packing 24 of the cap, the threadedsection 25 adapted to run in the nut 26 of the yoke 27 on the cap, andthe wheel 28 by which the stem is fed through the nut. As the cap 16 isheld in place by the bolts 29, it can be attached and detached readilyto examine, place, displace or repair the cage or box 6 with the partsthereof, or the valve 19 with its connections.

An aperture 30 is formed in the bottom of the case 1, and normallycovered by a plate '31 held in place by screws 32 for convenlence.

It will me understood that in operation, with the stop valve 19 in theretracted position shown, steam or other fluid acting through the inlet2 against the valves 11 or 11 'Wlth'SHlfiCGIlt force to lift them, willflow through the passages 10 and 8 to the outlet 3, while back pressurewill be communicated through thepassages 8 to seat the valves 11. Whenitisdesiredto close the line containing the case 1, the valve 19 isscrewed down on the cage 61 V Having described my invention, I claim:

A valve mechanism comprising a case provided with a diaphragm containingpassages, non-return valves forzcont'rolling said passages, a wallconnected with said diaphragm :and inclosing said passages and valves,and a stop valve in said casing and adapted to be seated on said wall.

2. A valve mechanism comprisinga case containing a box provided withpassages, non return valves adapted for controlling said passages, :saidvalves having guide means 'movable in said passages, and'a stop valveinsaidcase for closing said box. a

:3. A valve mechanism comprising a case containinga diaphragm having apassage or passages therein, a non-return valve 01' valves forcontrolling said passage or passages, a wall within .said case extendingfrom said diaphragm in the direction of movement of said valve or valvestherefrom, means within said wall for guiding the movements .of saidvalve or valves, and a 7 stop valve in :said case andgadapted to engagesaid wall whereby the flow through said case is stopped.

4. A valve mechanism comprising a case containing a diaphragm having apassage or passages therein, a non-return valve or valves forcontrolling said passage or passages, a wall in said case extending fromsaid diaphragm in' the direction of movement of said valve or valvestherefrom, valve guiding means Withinsaid wall, means onysaid valve orvalves co'ciperating with said guiding means for controlling themovements'of said valve or valves, and a stop valve within said case andadapted to be seated on said Wall-to hold said non-return valve orvalves seated.

, 5. A valve mechanism comprising a diaphragm containing passagesadapted for seating valves, a wall connected with said diaphragm, adevice containing through passages :and chambers fixed to said wa l-l,fluid passages communicating with said chambers, non-return valvesadapted for controlling said passages first named, pistons connectedwith said valves and adapted to act in 'said chambers to controlthe'movement of said valves, and a stop valve adapted to be seatedonsaidWall.

In testimony whereof I have hereunto set my name this 17th day of March,1914, in the presence of the subscribing witnesses.

Jos. G. DENNY,Jr., V C. N. BUTLER.

Copies, p1 this patent may be obtained forfive cents each, by addressing'the Commissioner .of Patents, I Washington, 11.0.

